Strap buckle



FIG. 1 is a top view of a strap buckle showing my new design;

FIG. 2 is a bottom view of the strap buckle;

FIG. 3 is a left side view of the strap buckle;

FIG. 4 is a right side view of the strap buckle;

FIG. 5 is a front view of the strap buckle;

FIG. 6 is a rear view of the strap buckle; and,

FIG. 7 is a top, right isometric view of the strap buckle. 

CLAIM The ornamental design for a strap buckle, as shown and described. 